地质通报2017，Vol.36Issue(9)：1506-1513,8.
安徽齐云山晚白垩世兽脚类恐龙足迹点沉积环境
Sedimentary environment of Late Cretaceous theropod tracksite in Qiyun Mountain, Anhui Province
摘要
Abstract
Qiyun Mountain theropod tracks from Anhui Province seem to be the best preserved tracks in several kinds of Late Creta-ceous tracks. The study of their sedimentary environment provides evidence for restoring the habitats of dinosaur fauna. All of the tracks are natural theropod casts, preserving Palaeophycus tubularis and Scoyenia sp., which indicates a shallow water in continental deposits. The thin section analysis reveals that the footprint layers are dominated by lithic sandstones. The four grain characteristic pa-rameters consisting of average size, standard deviation, skewness and kurtosis for the sandstones are consistent with features of the typi-cal fluvial deposits. Grain size distribution histogram, probability cumulative curves and scatter plots of footprint layers present the smaller particles and weaker hydrodynamic conditions upwards. The sedimentary environment displays the transformation from river-beddeposits to point bar deposits. Therefore, the sedimentary environment of Qiyun Mountain theropod tracksite was large meander-ing river deposition. Tracks were preserved in the lower part of point bar deposits which was the water source of the theropod fauna under the Late Cretaceous dry climate conditions.关键词
沉积环境/晚白垩世/兽脚类足迹点/安徽齐云山Key words
sedimentary environment/Late Cretaceous/theropod tracksite/Qiyun Mountain/Anhui分类
天文与地球科学引用本文复制引用
何情,邢立达,王晓丽,潘正华,胡毅,路硕..安徽齐云山晚白垩世兽脚类恐龙足迹点沉积环境[J].地质通报,2017,36(9):1506-1513,8.基金项目
安徽省自然科学基金项目《安徽齐云山晚白垩世恐龙蛋化石特征及古环境分析》(编号:1708085QD86)和安徽大学博士科研启动经费项目《安徽齐云山恐龙足迹点古环境分析》(编号:J10113190092) （编号:1708085QD86）
